The Snowmass Points and Slopes (SPS)

The ``Snowmass Points and Slopes'' (SPS) are a set of
benchmark points and parameter lines in the MSSM parameter space corresponding
to different scenarios in the search for Supersymmetry at present and future
colliders. They have been agreed upon as a consensus for a common set of
benchmark scenarios based ondifferent existing proposals for post-LEP benchmarks.

The actual benchmark values are the low-energy MSSM parameters:

The choice of the SPS has been motivated by the mSUGRA, GMSB, and AMSB
SUSY breaking scenarios.
In order to connect the above benchmark values (the low-energy MSSM
parameters) with the (high-energy) parameters of the mSUGRA, GMSB and AMSB
scenarios, a certain standard had to be defined.

Choosing ISAJET 7.58 as standard, the SPS correspond to the mSUGRA,
GMSB and AMSB parameters given here

If other programs than version 7.58 of ISAJET
are used to relate the benchmark values to mSUGRA,
GMSB and AMSB parameters, the latter parameters should be adjusted
accordingly in order to obtain
the correct benchmark values for the low-energy MSSM parameters (within
reasonably good approximation).

For calculating the SUSY spectra, branching ratios, etc. from the benchmark
values of the low-energy
MSSM parameters, the user should choose the most appropriate program
for his/her application. In order
to allow detailed comparisons of different studies based on the same
SPS benchmark values, the relevant
masses and branching ratios used in the analyses should be specified.

The SUSY particle spectra for the 10 SPS benchmark points can be found
here
.
See N. Ghodbane
and H.U. Martyn, hep-ph/0201233 for a detailed listing of the
mass spectra and
branching ratios for the SPS parameter points obtained with ISAJET
7.58.

In hep-ph/0201233
furthermore for SPS 6, 7, 8, 9 the calculation of the spectra and branching
ratios
with ISAJET 7.58 has been compared with the results of SUSYGEN
3 and PYTHIA
6.08 (for the same
low-energy MSSM input parameters). For SPS 1a, 2, 3, 4, 5 a comparison
between ISAJET 7.58, SUSYGEN 3 and PYTHIA 6.08 has been performed concerning
the precision for relating mSUGRA
parameters to low-energy spectra.

Please note:

Parts of this web page are still under construction. If you have available
the MSSM parameters for further benchmark points on the 7 model lines which
are not yet listed here, appropriate SPS input files for different codes
or other relevant information, please send mail to Georg.Weiglein@durham.ac.uk
, so that the page can continously be updated.